package com.lkd.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.google.common.base.Strings;
import com.google.common.collect.Lists;
import com.lkd.common.VMSystem;

import com.lkd.config.TopicConfig;
import com.lkd.contract.SupplyContract;

import com.lkd.contract.SupplyTaskContract;
import com.lkd.contract.VendoutContract;
import com.lkd.contract.VendoutData;
import com.lkd.dao.VendingMachineDao;

import com.lkd.emq.MqttProducer;
import com.lkd.entity.*;
import com.lkd.exception.LogicException;
import com.lkd.http.vo.CreateVMReq;
import com.lkd.service.*;

import com.lkd.utils.JsonUtil;
import com.lkd.utils.UUIDUtils;
import com.lkd.vo.Pager;
import com.lkd.vo.SkuVO;
import com.lkd.vo.VmVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Collectors;

@Service
@Slf4j
public class VendingMachineServiceImpl extends ServiceImpl<VendingMachineDao, VendingMachineEntity> implements VendingMachineService {

    @Autowired
    private NodeService nodeService;

    @Autowired
    private ChannelService channelService;

    @Autowired
    private VmTypeService vmTypeService;

    @Autowired
    private VendoutRunningService vendoutRunningService;

    @Autowired
    private MqttProducer mqttProducer;

    @Override
    @Transactional(rollbackFor = {Exception.class})
    public boolean add(CreateVMReq vendingMachine) {
        VendingMachineEntity vendingMachineEntity = new VendingMachineEntity();
        vendingMachineEntity.setNodeId(Long.valueOf(vendingMachine.getNodeId()));
        vendingMachineEntity.setVmType(vendingMachine.getVmType());
        NodeEntity nodeEntity = nodeService.getById(vendingMachine.getNodeId());
        if (nodeEntity == null) {
            throw new LogicException("所选点位不存在");
        }
        //复制属性
        BeanUtils.copyProperties(nodeEntity, vendingMachineEntity);
        vendingMachineEntity.setCreateUserId(Long.valueOf(vendingMachine.getCreateUserId()));
        vendingMachineEntity.setInnerCode(UUIDUtils.getUUID());
        vendingMachineEntity.setClientId(UUIDUtils.generateClientId(vendingMachineEntity.getInnerCode()));
        this.save(vendingMachineEntity);
        //创建货道数据
        createChannel(vendingMachineEntity);
        return true;
    }


    /**
     * 创建货道
     *
     * @param vm
     * @return
     */
    private boolean createChannel(VendingMachineEntity vm) {
        VmTypeEntity vmType = vmTypeService.getById(vm.getVmType());
        List<ChannelEntity> channelList = Lists.newArrayList();
        for (int i = 1; i <= vmType.getVmRow(); i++) {
            for (int j = 1; j <= vmType.getVmCol(); j++) {
                ChannelEntity channel = new ChannelEntity();
                channel.setChannelCode(i + "-" + j);
                channel.setCurrentCapacity(0);
                channel.setInnerCode(vm.getInnerCode());
                channel.setLastSupplyTime(vm.getLastSupplyTime());
                channel.setMaxCapacity(vmType.getChannelMaxCapacity());
                channel.setVmId(vm.getId());
                channelList.add(channel);
            }
        }
        channelService.saveBatch(channelList);
        return true;
    }


    @Override
    public boolean update(Long id, Long nodeId) {
        VendingMachineEntity vm = this.getById(id);
        if (vm.getVmStatus() == VMSystem.VM_STATUS_RUNNING)
            throw new LogicException("改设备正在运营");
        NodeEntity nodeEntity = nodeService.getById(nodeId);
        BeanUtils.copyProperties(nodeEntity, vm);
        return this.updateById(vm);
    }


    @Override
    public Pager<String> getAllInnerCodes(boolean isRunning, long pageIndex, long pageSize) {
        com.baomidou.mybatisplus.extension.plugins.pagination.Page<VendingMachineEntity> page = new com.baomidou.mybatisplus.extension.plugins.pagination.Page<>(pageIndex, pageSize);

        QueryWrapper<VendingMachineEntity> qw = new QueryWrapper<>();
        if (isRunning) {
            qw.lambda()
                    .select(VendingMachineEntity::getInnerCode)
                    .eq(VendingMachineEntity::getVmStatus, 1);
        } else {
            qw.lambda()
                    .select(VendingMachineEntity::getInnerCode)
                    .ne(VendingMachineEntity::getVmStatus, 1);
        }
        this.page(page, qw);
        Pager<String> result = new Pager<>();
        result.setCurrentPageRecords(page.getRecords().stream().map(VendingMachineEntity::getInnerCode).collect(Collectors.toList()));
        result.setPageIndex(page.getCurrent());
        result.setPageSize(page.getSize());
        result.setTotalCount(page.getTotal());

        return result;
    }

    @Override
    public Pager<VendingMachineEntity> query(Long pageIndex, Long pageSize, Integer status, String innerCode) {
        com.baomidou.mybatisplus.extension.plugins.pagination.Page<VendingMachineEntity> page
                = new com.baomidou.mybatisplus.extension.plugins.pagination.Page<>(pageIndex, pageSize);
        LambdaQueryWrapper<VendingMachineEntity> queryWrapper = new LambdaQueryWrapper<>();
        if (status != null) {
            queryWrapper.eq(VendingMachineEntity::getVmStatus, status);
        }
        if (!Strings.isNullOrEmpty(innerCode)) {
            queryWrapper.likeLeft(VendingMachineEntity::getInnerCode, innerCode);
        }
        this.page(page, queryWrapper);

        return Pager.build(page);
    }


    @Override
    public VmVO findByInnerCode(String innerCode) {
        LambdaQueryWrapper<VendingMachineEntity> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(VendingMachineEntity::getInnerCode, innerCode);
        VendingMachineEntity vm = this.getOne(queryWrapper);
        VmVO vmVO = new VmVO();
        BeanUtils.copyProperties(vm, vmVO);
        vmVO.setNodeAddr(vm.getNode().getAddr());//地址
        vmVO.setNodeName(vm.getNode().getName());//名称
        return vmVO;
    }


    @Override
    public boolean updateStatus(String innerCode, Integer status) {
        try {
            UpdateWrapper<VendingMachineEntity> uw = new UpdateWrapper<>();
            uw.lambda()
                    .eq(VendingMachineEntity::getInnerCode, innerCode)
                    .set(VendingMachineEntity::getVmStatus, status);
            this.update(uw);

        } catch (Exception ex) {
            log.error("updateStatus error,innerCode is " + innerCode + " status is " + status, ex);
            return false;
        }
        return true;
    }


    @Override
    public List<SkuVO> getSkuListByInnerCode(String innerCode) {
        //获取货道列表
        List<ChannelEntity> channelList = channelService.getChannelesByInnerCode(innerCode).stream()
                .filter(c -> c.getSkuId() > 0 && c.getSku() != null).collect(Collectors.toList());
        //获取有商品的库存余量
        Map<SkuEntity, Integer> skuMap = channelList.stream()
                .collect(Collectors.groupingBy(
                        ChannelEntity::getSku,
                        Collectors.summingInt(ChannelEntity::getCurrentCapacity)));//对库存数求和
        return skuMap.entrySet().stream().map(entry -> {
                    SkuEntity sku = entry.getKey(); //查询商品
                    SkuVO skuVO = new SkuVO();
                    BeanUtils.copyProperties(sku, skuVO);
                    skuVO.setImage(sku.getSkuImage());//图片
                    skuVO.setCapacity(entry.getValue());
                    skuVO.setRealPrice(sku.getPrice());//真实价格
                    return skuVO;
                }).sorted(Comparator.comparing(SkuVO::getCapacity).reversed())  //按库存量降序排序
                .collect(Collectors.toList());
    }

    @Override
    public Boolean hasCapacity(String innerCode, Long skuId) {
        var qw = new LambdaQueryWrapper<ChannelEntity>();
        qw
                .eq(ChannelEntity::getInnerCode, innerCode)
                .eq(ChannelEntity::getSkuId, skuId)
                .gt(ChannelEntity::getCurrentCapacity, 0);
        return channelService.count(qw) > 0;
    }

    @Override
    public VendingMachineEntity findByClientId(String clientId) {
        QueryWrapper<VendingMachineEntity> qw = new QueryWrapper<>();
        qw.lambda().eq(VendingMachineEntity::getClientId, clientId);
        return this.getOne(qw);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void supplyChannel(SupplyTaskContract contract) {
        String innerCode = contract.getInnerCode();
        LocalDateTime now = LocalDateTime.now();
        update(Wrappers.<VendingMachineEntity>lambdaUpdate()
                .eq(VendingMachineEntity::getInnerCode, innerCode)
                .set(VendingMachineEntity::getLastSupplyTime, now)
        );
        List<SupplyTaskContract.SupplyTaskChannel> channelList = contract.getChannelList();

        for (SupplyTaskContract.SupplyTaskChannel supplyTaskChannel : channelList) {
            String channelCode = supplyTaskChannel.getChannelCode();
            int capacity = supplyTaskChannel.getCapacity();

//            ChannelEntity channel = channelService.getOne(Wrappers.<ChannelEntity>lambdaQuery()
//                    .eq(ChannelEntity::getChannelCode, channelCode)
//                    .eq(ChannelEntity::getInnerCode, innerCode)
//            );
//
//            channel.setLastSupplyTime(LocalDateTime.now());
//            channel.setCurrentCapacity(channel.getCurrentCapacity() + capacity);
//
//            channelService.updateById(channel);

            channelService.update(Wrappers.<ChannelEntity>lambdaUpdate()
                    .eq(ChannelEntity::getChannelCode, channelCode)
                    .eq(ChannelEntity::getInnerCode, innerCode)
                    .setSql("current_capacity = current_capacity + " + capacity)
                    .set(ChannelEntity::getLastSupplyTime, now)
            );
        }

    }

    @Override
    public void vendout(VendoutContract vendoutContract) throws JsonProcessingException {
        long skuId = vendoutContract.getVendoutData().getSkuId();
        String innerCode = vendoutContract.getInnerCode();

        //1.扣减库存
        //获取售货机上 这个商品的所有货道，遍历货道，拿到第一个有货的货道，扣减库存
        List<ChannelEntity> channels =
                channelService.getChannelesByInnerCodeAndSkuId(innerCode, skuId);

        if(CollectionUtils.isEmpty(channels)){
            //如果集合是空，代表当前货道里没有商品
            log.error("当前售货机没有此类商品!" + JsonUtil.serialize(vendoutContract));
            return;
        }

        //筛选有货的货道
//        ChannelEntity channelEntity = null;
//        for (ChannelEntity channel : channels) {
//            if(channel.getCurrentCapacity() > 0){
//                //找到了
//                channelEntity = channel;
//                break;
//            }
//        }
//        if(channelEntity != null){
//            //有数据
//        }

        Optional<ChannelEntity> optional =
                channels.stream().filter(x -> x.getCurrentCapacity() > 0)
                .findFirst();
        if(optional.isPresent()){
            //有数据,将库存-1 保证线程安全
            ChannelEntity channelEntity = optional.get();
            channelService.update(Wrappers.<ChannelEntity>lambdaUpdate()
                    .setSql("current_capacity = current_capacity - 1")
                    .eq(ChannelEntity::getChannelId,channelEntity.getChannelId())
            );
            vendoutContract.getVendoutData().setChannelCode(channelEntity.getChannelCode());
        }else{
            //没有有货的货道，直接返回，记录错误
            log.error("当前售货机所有货道都缺货!" + JsonUtil.serialize(vendoutContract));
            return;
        }

        //2.记录出货流水
        VendoutRunningEntity vendoutRunningEntity = new VendoutRunningEntity();
        vendoutRunningEntity.setStatus(false);
        vendoutRunningEntity.setSkuId(skuId);
        vendoutRunningEntity.setOrderNo(vendoutContract.getVendoutData().getOrderNo());
        vendoutRunningEntity.setInnerCode(innerCode);

        vendoutRunningService.save(vendoutRunningEntity);

        //3.发消息给售货机
        mqttProducer.send(TopicConfig.getVendoutTopic(innerCode),
                2,vendoutContract);
    }


}
